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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.1: Codes and Standards >THE EFFECT OF LWR COOLANT ENVIRONMENTS ON THE FATIGUE LIFE OF REACTOR MATERIALS
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THE EFFECT OF LWR COOLANT ENVIRONMENTS ON THE FATIGUE LIFE OF REACTOR MATERIALS

机译：轻水堆冷却剂环境对反应器材料疲劳寿命的影响

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摘要

The existing fatigue strain-vs.-life (ε-N) data illustrate potentially significant effects of light water reactor (LWR) coolant environments on the fatigue resistance of pressure vessel and piping steels. This paper reviews the existing fatigue ε-N data for carbon and low-alloy steels and austenitic stainless steels in LWR coolant environments. The effects of key material, loading, and environmental parameters, such as steel type, strain amplitude, strain rate, temperature, dissolved oxygen level in water, flow rate, surface finish, and heat-to-heat variation, on the fatigue lives of these steels are summarized. An updated version of the ANL statistical models is presented for estimating the fatigue ε-N curves for these steels as a function of the material, loading, and environmental parameters. The F_(en) (environmental fatigue correction factor) approach for incorporating the effects of LWR coolant environments into the fatigue evaluations of the American Society of Mechanical Engineers Code is presented.
机译：现有的疲劳应变-寿命（ε-N）数据说明了轻水堆（LWR）冷却剂环境对压力容器和管道钢的抗疲劳性的潜在重大影响。本文回顾了LWR冷却剂环境下碳钢，低合金钢和奥氏体不锈钢的现有疲劳ε-N数据。关键材料，载荷和环境参数（如钢的类型，应变幅度，应变率，温度，水中的溶解氧水平，流量，表面光洁度和热变热）对疲劳寿命的影响这些钢进行了总结。提出了ANL统计模型的更新版本，用于估算这些钢的疲劳ε-N曲线，该曲线是材料，载荷和环境参数的函数。提出了一种F_（en）（环境疲劳校正因子）方法，该方法将LWR冷却剂环境的影响纳入了美国机械工程师协会代码的疲劳评估中。

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